Fastener



FIG. 1 is a front, top, left perspective view of a fastener, showing my new design;

FIG. 2 is a right side view of the fastener of FIG. 1;

FIG. 3 is a left side view of the fastener of FIG. 1;

FIG. 4 is a front view of the fastener of FIG. 1;

FIG. 5 is a rear view of the fastener of FIG. 1;

FIG. 6 is a top view of the fastener of FIG. 1; and,

FIG. 7 is a bottom view of the fastener of FIG. 1.

The broken lines shown are included for the purpose of illustrating portions of the fastener that form no part of the Claim. 

CLAIM The ornamental design for a fastener, as shown and described. 